Background: Depression is on the top list of mental disorders which account for about 25 percent of patients referred to health centers in your world. So, is presented in different ways to treat it. Therefore, the aim of this study is to compare the effectiveness of Dialectical Behavior Therapy and Cognitive Behavioral Group Therapy in reducing depression in mothers of children with disabilities.

Materials and Methods: This study is quasi-experimental and consists of experimental and control groups. This study population was mothers referred to mobility, occupational therapy and physiotherapy centers who had depressive symptoms. 8 patients in each group were selected by convenience sampling. The research instrument were the Structured Clinical Interview for DSM-IV Axis I disorders and the revised Beck Depression Inventory form (1996). Dialectical behavior therapy and cognitive behavior therapy groups were instructured for 2 months (8 sessions of 2 to 2.5 hours). But the control group did not receive intervention.

Results: The results showed that there were significant differences between the mean depression scores of dialectical behavior therapy and cognitive therapy group with control group (p<0.001). Also, there is a significant difference between the mean depression scores of dialectical behavior therapy with cognitive therapy (p<0.001).

Conclusion: In the area of treatment and working with depressed people and those who are in crisis mode, it seems that dialectical behavior therapy and cognitive therapy group in view of its nature is very efficient and promising.